Core-drilling apparatus.



PATENTED FEB. 11, 1908.

0. A. TERRY. GORE DRILLING APPARATUS. APPLICATION FILED MAY 29 1907 INVENTOR Q g BY fiJATTORNEYS WITNESSES:

LA; Spa/A To all whom it may concern:

COLEMAN A. TERRY,

or NEW YORK, N. .Y.

CORE-DRILLING APPARATUS.

Specification of Letters Patent.

Patented Feb. 1 1, 1908.

Application am m 29.1907. seal Np. 376.300..

Be it known that I COLEMAN A. TERRY, a citizen of the United States of America, and a resident of the borough'of Manhattan, of the I city of New York, county and State of New -York, have invented certainnewand useful Im rovements in Uore-DrillingiApparatus, of which the following is aspecification, refer ence being had to the accompanying draw-..

ings, forming a part thereof;

' My invention-relates to improvements in core drilling apparatus, and'particularly to feedin means employed therein. In this class 0 apparatus it has'been common in the past to employ what is known as a rope feed,

drums arsuch 'feed comprising windin ran ed upon opposite sides 0 the central drill rods, with ropes connected to the said drill rods through some intermediatenieans,

such for instance asby connecting them with arms extending from the water swivel, which is located at the upper end of the said drill rods. Therehave been'some serious objections, however, to this form of feeding mechanism, in that such feed has a tendency to cause the drill to drift, that is to say, to drill its hole out of plumb; This has been caused first bythe fact that the re es sometimes wind up and unwind;'uneve y on the two drums, so that-the pull upon the drill'rod isd not a straight line, and second, should the rope onon'e drum overlap revious 'coils, a greater length of rope woul be wound up in a single revolution of that drum, than would be wound u on the drum on the other side if the rope t ereon did not so overlap. This would .causea greaterpnll onthe rope on one sideof the drill rods than u on the other.

There is always more or ess tendency for a core drill to drift, and the greatest pains has to be taken to prevent this occurrence- Anything, therefore, which would be liable to increase this tendency to drift must be avoided, and hence a ro e feed, though otherwise the ideal feed for th flexibility, has been brought into disrepute.

' In my. resent invention I have devised means.

where y the pull on the drill rods shall be equalized, so that the tendency to cause same-to drift will be entirely overcome. I em loy a yoke which surroundsthe upper dr' rod and water swivel thereon, said yoke being connected by means of freely swinging links to a collar or bushing, which is inturn mounted between upper and lower anti-frictionbearings upon tis class of drill owing to its e journal of the said water swivel; and Ihave then connected the ends of the ropes from the feed drums to the ends of arms extending from the saidyoke. Under this construction, if one rope should be fed to a greater degree than the other, the said yoke may swing u )on its pivot, while if lateral pressure is applied thereto, the said yoke may swing laterally through the said links] In order that-my invention may be fully .understood, I will now rocecd to describe an embodiment thereof, raving reference to the accompanying drawings, illustrating the same, and will then point out the novel features in claims.

In the drawings: Figure 1 is a front view of .such part of a core drilling apparatus as is necessary to illustrate my invention, showing a feeding mechanism embodying my invention employed in connection therewith. F ig. 2 is a view in central longitudinal section through the water swivel and yoke employed therewith. Fig. 3 is a top view of the yoke with a portion of the water swivel shown in horizontal section. i i

Thedrill'itself, whichis shown somewhat conventionally,- includes hollow drill rods 5 secured to the drill rods at the upper end thereof, said water swivel comprising a j ournal 8, a connecting sleeve 9 by which the said f journal is connected to the drillrods, abush- 'ing 10 loosely surrounding the journal 8, an anti-friction bearing 11" between the said bushing and a shoulderedportion of the said journal, another -antifriction bearing 12 arranged above the said bushing 0, a nut 13 confining the said bearings and bushing upon the journal, and a spindle. 14 arrang ed within the journal8, and also confined in position i by the said nut 13. The spindle 14 is screwan elbow 15 by w ich water is admitted to the core drill for purposes well known. When the. drill rods are rotated the journal 8 is rotated therewith together with the-nut 13 and portions of the bearings 11, 12... The other spindle 14. A bail 16 is secured to the said bushing 10 by which the drillrods may be lifted when desired, said bail being connected "to said bushing by means of screws 17. At right angles to the screws 17 the said bushing has links 18 connected thereto,-one upon each and a rotating means 6., a A water swivel 7 is I threaded at its up er end, to which is fitted portions of the bearings 11, 12 remain stationary, as do also the bushing 10 and the side. thereof, said links being pivotally con-.

. adapted tore'ceive and form an anchorage for rOpeends. The yoke is solconstructed as tobe permitted free lateral play to a limited extent with respect to" the water swivel, the opening 23 therethrough being sufficiently elongated in a lateral direction to permit such play, as will be clear by reference to Figs. 2 and 3 of the drawings.-

Feed ropes .2 1 are connected at their upper ends to the arm 22 of the yoke 21, and at their lower ends are taken up upon feed drums 2'5. Said feed drums are mounted upon a shaft- 26 journaled in suitable bear-- ings 27, rotative feeding movements being imparted to 'the shaft 26 and drums by any desired means. Should now the ropes coil or uncoil unevenly upon the drums 25, the yoke 21 will, by means of the link connection 18, be' permitted to swing laterally, so thatno lateral pressure will be imparted to the drill rods as they are being fed forward.

Similarly, if one rope 24 should be wound up a little faster than the other, the swinging movement which the yoke 21 is free to make compensatetherefor, and even longitudinal pressure will be exerted upon the drill rods. The anti-friction bearing between the bushin 10 and the shouldered portion of the journa 8will also tend to increase the efli- "ciency of the. machine and to decrease fric- I tion and wear'ofthe parts.

What I claim is:

1. In core drilling apparatus, the combination with ajdrillrodand rope feed-thereforcomprising means and ropes arranged to beiwound thereon, of an e ualizingyoke to which the upper endsfof sa1d ropes are attached, said e ualizin yoke having .a t

' Witnesses:

pivotal connection Wlth sai drill rod.

2. In core drilling apparatus, the combinationwith a rod and rope feed there- I for comprising Winding means and ropes arranged to be wound thereon, of an equalizing yoke to which theupper ends of said ropes are attached, a collar for transmitting feeding movements to said rod, an connecting said collar with said yoke.

3. In core drilling a paratus, the combination with a drill r0 and a water swivel having a journal secured to the upper end of said drill rod, of a bushing mounted on said journal, an anti-friction bearing beneath said bushing and forming a thrust bearing between said bushing and the said journal in links a longitudinal direction, an equalizing yoke concentric with saidcollar and located beneath same, links pivotally connected to said yoke and said collar, whereby said yoke is suspended from said collar, said yoke ermitted free lateral movement, ing means for imparting longitudinal move;

ments .to theyoke, and parts connected thereto, and ropes upon said winding means connected at their outer ends to said yoke.

, fl. In core drilling 'a paratus, the combination with a drill ro and a water swivel at the upper end thereof comprising a journal 8, a' connecting sleeve 9 for connecting the said journal with said drill rod, and a nut 13 upon said journal, of a bushing 10 mounted upon said journal, anti-friction bearings 11 and 12 mounted above and below the said bushing, links 18'pivoted at their up er ends to said bushing, a yoke 21 pivote to the said links at their lower end, said yoke surrounding the said journal but permittedlateral movement with res ectthereto, and

hayin arms 22 extending m-theline of said latera movement, drums 25 having "their peripheriesin line'with thesaid yoke arms 22, and ropes 24 upon said winding drums having their upper ends. connected to the arms 22 vof said as set forth..

' COLEMAN A. TERRY.

D; HOWARD 'IIAYwooD, LrMANS, ANnnEw's, Jr.

yoke 21, substantially 

